| Year | Count |
|---|---|
| 1919 | 5 |
| 1921 | 8 |
| 1922 | 6 |
| 1923 | 7 |
| 1924 | 8 |
| 1925 | 5 |
| 1927 | 8 |
| 1928 | 7 |
| 1930 | 10 |
| 1939 | 7 |
| 1940 | 5 |
| 1941 | 6 |
| 1942 | 5 |
| 1943 | 6 |
| 1944 | 11 |
| 1945 | 11 |
| 1946 | 9 |
| 1947 | 15 |
| 1948 | 5 |
| 1949 | 12 |
| 1954 | 15 |
| 1955 | 24 |
| 1956 | 16 |
| 1960 | 10 |
| 1963 | 16 |
| 1964 | 14 |
| 1966 | 14 |
| 1967 | 16 |
| 1968 | 14 |
| 1971 | 8 |
| 1972 | 7 |
| 1973 | 5 |
| 1975 | 7 |
| 1978 | 5 |
| 1979 | 5 |
| 1980 | 6 |
| 1982 | 7 |
| 1983 | 7 |
| 1985 | 8 |
| 1988 | 5 |
| 1989 | 6 |
| 1993 | 6 |
| 2015 | 10 |